Answer to Question #345478 in General Chemistry for Han

Question

How many grams of H2O will be produced, if 26.31 of CO2 are also produced in the following reaction?

C3H8 + 5O2-----> 3CO2 + 4H2O

Show the solution.

Answer 1

M_r (H₂O) = 18 g/mol;

M_r (CO₂) = 44 g/mol;

C₃H₈ + 5O₂ = 3CO₂ + 4H₂O

According to the above reaction, when 132 g (3 mol * 44 g/mol= 132 g) of CO₂ are formed, 72 g (4 mol* 18 g/mol = 72 g) of H₂O are formed. We find how many grams of H₂O are formed when 26.31 grams of CO₂ are formed:

132 g CO₂ — 72 g H₂O

26,3 g CO₂ — X

X = 26,31 * 72 / 132 = 14,35 g H₂O

ANSWER: 14,35 g H₂O